I wouldn't give your experiences with the 657 meaning that D-Link is entirely bad. They do have some great routers. I have enjoyed most of them. Like most Mfrs there are some bad apples. I like the 645, 655, 810L, 826L, 836L and 868L the best. The 868L is a solid router and well made. The other models are good models as well.
The 657 just didn't get enough development as it was an introduction to the Amply line. It was fairly basic and probably should have more testing with the WiFi drives. Again I didn't much of any issues with it and believe most of the issues where between the WiFi drivers and Android devices at the time. The follow on 645, 827 and 857 of the same line were made better than the 657 was. Give some of the other models a chance. Where ever you bought this router from, maybe tell them that it's no longer being supported and to stock some more up to date newer generation routers from D-link.
And maybe next time you can go thru some troubleshooting step to see where the real problem maybe. Sometimes it's not always the routers fault.
Also has a suggestion, turn OFF the wifi radios on the 657 and install a wifi AP or a different DIR series router that has been configured for this:
How to extend network without AP Mode using a RouterThe wifi radio maybe faulty on the 657 however doesn't mean the rest of the router is. I do this all the time with my routers.
Good Luck.
Just retuned this device to the shop and got different brand. Cannot believe that I can still buy it, and all devices are not returend to manufacturer.
Only because of this dir-657 I will never think about of buying any Dlink again 
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Topic: Is D-Link doing anything about the Wi-Fi stability issues? (Read 177724 times)